import type { ADFEntity, VisitorCollection } from '../types';
export declare function validateVisitors(_visitors: VisitorCollection): boolean;
/**
 * Provides recursive, depth-first search document traversal. Use visitors collection to define nodes of interest.
 * If no visitor for given node is defined, no-op happens.
 * If visitor returns new node, the old node is replaced.
 * If visitor returns false, node is dropped from the document.
 * If visitor returns null/undefined/void, original node is used.
 * @param adf Document to traverse.
 * @param visitors Collection of visitors.
 */
export declare function traverse(adf: ADFEntity, visitors: VisitorCollection): false | ADFEntity;